Pumping mechanism



. mental May 14; 51929.-

yuil-11151) STATES Aiwi'rsiar oFFicE.

Tnoii'ms J. LITLE, JR., or DETROIT, MICHIGAN, AssIGNoR To INC., or DETROIT, MICHIGAN,

ooPELAND PRODUCTS,

A CORPORATION OE MICHIGAN.

PUMPING MECHANISM.

Application ld September v system which may be used to operate various culinary and household appliances independently of theoperation of the refrigerant circulatory system. Y t

A further object of my invention is to provide means for rendering the refrigerant circulatory system inoperative Awhen .it is'de-v sired to use the motor to operate various culinary and household appliances.

With these and other objects in View, my invention consists in the arrangement, combination and construction of the various parts of my improved device, as described in Athe specication, claimed in my claims and shown in the accompanying drawings, in which:

Fig. 1 is a side elevation of a refrigerator cabinet with parts broken away and having a refrigerating system embodying my 1nvention attached thereto.

Fig. 2 is a sectional view of the compressor of arefrigerating system embodying my invention. .y

Fig. 3 is a diagrammatic sketch of the electrical connection between the motor of said refrigerating system, and my invention.

I have shown a refrigerator cabinet 1 having a motor 6 with a refrigerantgcompressor 7 secured thereto, mounted on the cabinet top 2. Within the upper portion of the cabinet 1 is positioned a refrigerant expansion chamber 8, and on the exterior back Wall of cabinet l is positioned a refrigerant' condenser 9. The pipe 10 connects the com-v f permit the sha presser-7 `with the condenser 9; the pipe 11, the expansion valve 12 and the pipe 13 connect the -condenser 9 with the expansion chamber 8, and the pipe 121 connects the expansion chamber 8 with the compressor. 7, thus completing the refrigerant circulatory system. f. ,y f

The-shaft 15 of the motor 6 has its end 16 fashioned for operative engagement with sundry culinary -and householdappliances such as egg beaters, etc., and the motor 6'is so positioned u on the cabinettop 2\as to 15 to extend over an ungoccupied portion of the cabinet top 2 ppbn 1s, .1926. serial No. 136,357.

`which may be positioned as desired the various culinary and household appliances which are operable by the shaft l5.

The compressorf which is secured to the motor 6 comprises a housing 20, acylinder 21 formed integrally with the upper portion of the housing 20, and a hollow piston 22 operable in cylinder 21. Within the piston 22 and bearing at one end against thc closed' end 23 of the piston 22 and at theother end against the head ,24 of cylinder 21 is a coil spring 25 normally'tensioned'to force t-he piston 22 downward for its downward stroke through cylinder 21. The shaft 15 of Vthe motoi' 6 extends'into the lower portion of housing 20 beneathl the closed end 23 of A piston 22, and has an eccentric lor cam 26 secured to theend thereof .for operative con-i tact with the closed end 23 `of piston 22.

The cam 26 rotates with the shaft 15 and bj its contact with the closed end '23 of piston 22 forces piston 22 upward through cylinder 21 at spaced intervals, and thus'causes the upward strolre of the piston. i

Formed on the upper part of the housing 20, and integral therewith, isa. valve housing' 27 having an inverted and reversed L shaped chamber 30, the vertical end of which leads into the top of cylinder 21. Beneath thehorizontal portion of the chamber 30, in the Avalve housing 27, is formed a reversed, L shaped passage 31 the horizontal end of which is adapted to lreceive the end of intake pipe 14, andthe vertical endof which opens intothe horizontal portion of chamber 30. v,The vertical end of passage '31 is enlarged and recessed where and completes,l the intake valve for the compressor 7. e

1t opens into chamber 30 to form the flange 32 around the end of passag'e31 vfor supporting the movable valve. plate V33 which covers theV end of passage 31 An linternally screw-threaded 0pening34 v leading into the horizontal portion of. cham- .ber 30 directly 'above-the vertical end of'gs` of core 42 extendedV within the horizontal portion of chamber 30 to a point removed from and directly above the valve plate 33. The magnet 40 is tightly secured in the opening 34 by the screw plug 43 which is secured around core 42 below the winding 41 and which has a flange 44 formed on .its upper portion for overlapping the edges of opening 34, and external screw threads on its lower portion adapted to fit the threads of opening 34. The wires 45 and 46 extend to the source of electric current (not shown) and the motor 6 respectively, thus connecting the velectro-magnet 40 in series with the motor, 6. A A

In F ig. 3 I have shown a diagram of the electrical wiring in which'the electrical current is carried from its source through wire 45 to magnet 40, and from magnet 40 by w-ire 46 to switch terminal 47. Between the sourcey of current and the magnet 40 the y wire 45 is tapped by the wire 60 which carries current to a control device 61 which consists of a tiltable bulb having mercury therein, adapted when the bulb is tilted to make or break the circuitv to control the op.

eration of the motor .6. Various thermostatically operated devices for actuating the bulb in response to the telnperatures within the cabinet 1 may be used, one of which is the subject matter of my application for Letters Patent of the United States on control for refrigerating mechanism, filed J une 12', 1926, Serial No. 115,686. The wire 62Y connects the control device 61 with the switch terminal 49. The wire 50 leads fromY the switch terminal 48 to the motor 6 and `the wire 52 leads from the motor 6 to ground, thus establishingfa circuit through themotor 6 whenever points 48 and 49 or 47 are connected. Any suitable switch may be used to connect terminals 48 and 49 or 47 lto obtain a circuit through motor 6 and either the thermostatic control 61 or the magnet In operation, the motor 6 when supplied with current causes the operation of piston 22 in cylinder 2 1 ofthe compressor 7. Normally the downward stroke of piston 22 will cause the valve closure 33 to be lifted from flange 32 at the end of passage 31 and will draw refrigerant from the expansionv chamber 8 through pipe 14, passage 31 and chamber 30 into cylinder 21. The upward stroke of the piston 22 willv compress the refrigerant, force the valve closure 33 down against flange 32 and thus close the passage 31, and the compressed refrigerant will be forced out of cylinder 21 through a Vsuitable outlet valve (not shown) into pipe 10 and so to thc condenser 9, thus causing a circulation of refrigerant.

i lVhen it is desired to have the motor opcrate any of the variousculinary and household appliances which may be attached to which will attract the metal valve plate 33, A.

lift it from its seat on flange 32 and retain it against the end ofcore 42 so long as current is passing throughy winding 41. The passage 31 is thus held open and the operation of the piston 22 in the cylinder 21 will merely move refrigerant back and forth through passage 31 and pipe 14 to the expansion chamber 8 without compressing it or forcing it into the condenser 9, consequently' the refrigerant is not circulated through the system and no refrigeration takes place within the cabinet while the motor is being operated with the compressor intake valve open.

It will be obvious that various changes may be made in the arrangement, combination and construction of the various parts of my improved device without departing from the spirit of my invention, and it is my intention to cover by my claims such changes as may be reasonably included within the scope thereof.

What I claim is: Y

l. In combination, an electric motor, a

pump connected thereto for continuous simultaneous movement therewith, said pump being provided with a pumping chamber and an inlet passage leading thereto, a seat in said passage, a valve member co-operating with said seat for limiting the fiow of fluid through said passage to one direction only, an electro-magnet, a fixed core for said magnet extending through a Wall of said passage into spaced relationship in respect to said valve member on the side thereof opposite to said seat for limitingthe lifting movement of said valve member from said seat, and means for energizing said electro'- magnet fwhereby to hold said valve member through a wall of said passage and terminating on the opposite side of said valve from said seat and in spaced relationship in respect thereto for lifting said valve and limiting the lifting movement of said valve during the normal functioning of said pump.

3. Incombination, a pump having a pumping' chamber and an inlet passage leading thereto, a valve seat in said passage, a

valve member co-operatingl with said seat, and an electro-magnet comprising a core and Winding, said core extending through the said valve during normal operation of said Walis of said assage and terminating in pump, and acting to hold said valve away normally space relationship with -respect to from said seat when' said magnet is ener- 10 said valve member on the sidethereof opgized, whereby said pump may be operated posite to said seat, and said windings being Without causing a pumping action.

positioned exteriorly of said passage, said core providing a stop for limiting the lift of THOMAS J. LITL, JR. 

